Thanks Blapper. The woman in the shop said they wouldn't recommend them for track days, and tried to steer me towards a full on sports tyre, but 90% of my mileage is on the road, and I'm really in the lower end of the intermediates group on track days if I'm honest.

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Well it came out of this 'ole, so it's *@*ing going back in again!

As I understand it they are softer on the sides than the middle and although they are doubtless not soft enough for real heroics, They have given me no worries at all on the road. I find the rear locks too easily, but that is most likely bad technique on my part. I have done 3K miles so far and the still look like new.